Feed-water valve



May 20, 1930. v. vEENscHQTEN 1,759,146

FEED WATER VALVE Filedl May 6, Y1927 15 v l @m37 ik m [U 19 21 Patented May 20, 1930 UNITED STATES PATENT orf-ICB VINCENT V'. VEENSCHOTEN, OF ERIE, TENNSYLVANIA, ASSIGNOR TO NORTHERN EQUIPMENT COMPANY, OF ERIE, PENNSYLVANIA, A CORPORATION OF PENNSYL- vente FEED-WATER VALVE.

Application led May. 6, 1927. Serial No. 189,254.

Thisinvention relates to means for controlling the fiow of fluids through orifices and particularly to the flow of water through valves. It has for its object the production w of means for controlling the fall in pressure of the Huid through the orifice when variations occur in the back pressure or the driving pressure of the fluid as it lows through the orifice. In carrying out this object in 10 this particular lapplication of the invention,

I provide a valve casing with two plungers, and provide means for operating the plungers so that, as the valve ports of one of the l plungers opens to allow more ilow, the valve port of the other plunger will be open more in order to control the pressure drop through the first mentioned valve port. The twfo plungerscontinuously coact so as to control,

as may be desired, the pressure drop throughthe first port irrespective of the pressure drop through the second port.

Of the accompanying drawings, Fig. 1 is a more or less diagrammatic elevation of the application of apparatus to the feed-water valves of steam boilers7 which embodies the features of my invention; Fig. 2 is a central sectional view of one of the valves; and Fig. 3 is a central longitudinal sectional view of a control valve of the apparatus. In order to more clearly explain my invention I have illustrated and described'herein the invention as applied to the feed-water valves of steanboilers, but itis to be understood that the invention is applicable in general to the flow of any fluids through valves or other oriiices.

The system which I prefer to illustrate my invention comprises a battery of steam boilers 5, which have feed-water val-ves 6 inserted in feed-water pipes 7. A steam pump 8 is adapted, in an ordinary manner, to force water through the pipes and valves into the boilers to meet the needs. Each valve is controlled in part by means of a feed-water regulator 9 which may be any suitable type. In this instance I have illustrated a thermostatic tube regulator which has its upper and lower ends operatively connected respectively, by`

, means of pipes 10 and 11, to the steam space 50.a nd the water space of the boiler. l Operatively connecting the valve with the thermostat are levers 12 and 13 and a Vlink 14. .The thermostat operates, in a well known manner, to raise or lower a plunger 15 mounted in the ports 16 of the valve casing 6. .As is wellV understood, as the water in the boiler lowers the -tube 9 will expand and allow the weight 17 to lower the lever 13 and raise the plunger 15-so as to open more the valve ports 16.

, It is sometimes desirable, in the operation of systems of this nature, to maintain substantially constant the pressure drop of the liquid through the valve ports 16. But with the single plunger 15 this is not continuously the result as the pressure drop through the ports will decrease as the iow therethrough increases by opening morethe valve ports. To prevent this drop in pressure, however, I provide-in the valve partition 18 a port or ports 19 in which is operatively mounted a plunger 20. By suitable means, this plunger 20 is operatedso that the ports 19 will be opened more and more as the ports 16 are opened. This will allow the pressure in the chamber 21 to be more effective in the chambers 22 and thus to increase the pressure of the liquid at the inlets of the valve ports 16. This offsets the decrease in pressure in these chambers-which ordinarily follows the greater opening of the valveports 16.

In order to properly control the plunger 20, so that the coaction between it and the plunger 15 may produce vthe desired results,

any suitable apparatus may be used. I prevthe valve 6. By means of these connections the diaphragm is affected on its upper side by the pressure on the inlet side of the ports 16 andr on its lower side by the pressure at the outlet side of the port 16.

As the inlet pressure is normally greater a weight 30, by means of a lever 31. and an vent any binding tendency, a weightk33 and.

a levei` 34 may be mounted on the opposite side of the valve casing and operatively associated with the arm 32 The diaphragm is thus held balanced and it, in turn, holds the plunger in the desired position tov give he proper pressure of the liquid on the chamer 22.

It will thus be seen that, if the pressure in the chamber 22 increases for any reason, the diaphragm will be forced downward somewhat and the plunger 2() will thus be forced downward and the ports 19 will be closed somewhat more, tending to decrease the pressure in the chamber 22 and thus holding substantially constant the drop in pressure through the ports 16. Conversely, if the pressure in the chamber 29 increases or decreases the diaphragm will be elevated or lowered, and the plunger 20 will be operated so as to bring the drop in pressure through the ports 16 back to normal.

I have found, however, that, in case of material increase in the opening of the ports 16, it is desirable to open the ports 19 somewhat more than they are normally opened by the operation of the diaphragm. To produce this result I provide a link connecting the levers 13 and 31, so that, as the lever 13 is operated to move the plunger 15, the lever 31 will be affected so as to vary more or less the position of the plunger 20., Thus, as the plunger 15 is raised to open the ports 16 more the plunger 20 will be raised somewhat to open the ports 19 more. In order to more desirably control this effect I provide a spring 36 inserted in the link connection between the levers, thus providing a yielding means, so that the lever 31 is not positively forced to move with the lever 13, the spring 36 allowing the diaphragm 25 to have its proper control of the arm 32 in spite of the connection between the two levers. In order to properly adjust the spring tension, adjusting means may be used, such as the turn buckle 37, and the effect of the leverage may be varied by shifting the link connection in the holes 38 or 39, or other uitable adjusting means may be provided If desired, instead of the link connection 35, or even with the link connection, a pipe 40 may be inserted in the chamber 29 connecting with the pipe 28 so that the kinetic energy of the water flowing through the` chamber 29 will assist the static pressure in the chamber in controlling the position of the diaphragm 25. As the ports 16 are opened more, and the flow of water therethrough increases` `the pressure on the open end of the pipe 40 will increase, thus raising the diaphragm and opening more the ports 19, and thus increasing the pressure. at the inlet of the ports 16. A funnel end 41 may be provided to increase the kinetic pressure in the pipe 28, and the size thereof, and of the pipe, may be adjusted f0r the particular needs; so that by this arrangement, with or without the linkv 35,l the diaphragm may be controlled so as to control as desired the drop in pressure through the ports 16.

4Although I have referred herein to maintaining substantially constant the drop in pressure through the ports 16, yet it is to bc understood that, by the proper use and adj ustment of the apparatus described, the drop ain pressure through the ports 16 might be in- @creased or decreased as the flow in water through the ports 16 increased. 'Ihat is to say, I do not desire to confine my invention to merely maintaining constant this pressure drop, but by variations that would be obvious to those skilled in the art the invention may be applied to controlling this .pressure kdrop as might be desired; and otherchanges in the apparatus described might be made by those skilled in the art without departing from the spirit of my invention as disclosed by the following claims.

I claim :y

1. A Huid conduit, a casing connected in said conduit, a chamber in said casing, a partition across said chamber, a main and a control valve in said partition, means for varying the opening of said main valve, and means depending on the drop in pressure through said main valve for varying the opening of said control valve.

2. In a boiler feed water system a feedwater pipe, a. valve casing connected in said pipe, said casing having an inlet and an outlet, a chamber in said casing, a partition forming one sideof said chamber, two ports in said partition, a main valve arranged to open and close one of said ports, a control valve arranged to open and close the other of said ports, means for operating the main valve for opening said main valve port, and means controlIed by the relative liquid pressure in said chamber and in said outlet for controlling the position of said control valve.

3. In a boiler `feed-water system, a feedwater valve and a control valve for affecting the fall of pressure through said feed-water valve, a lever for operating each of said valves, and means connecting said two levers.

4:. In a boilerl feed-water apparatus as claimed in claim 3, in which said lever connecting means comprises a resilient member.

5. A fluid conduit, a casing connected in said conduit, a chamber in said casing, a partition across said chamber, a main and a control valve in said partition, means for varying the opening of said main valve. means depending on the drop in pressure through said main valve for varying the opening of said control valve, and other means for varyi i' ing the opening of said cont-rol valve as said main valve opening varies. y

6. In a boiler feed water system, a feedwater pipe, a valve casing connected in said pipe, said casing having an inlet and an outlet, a chamber in said casing, a partition forming one side of said chamber, two ports in said partition, a main valve arranged to open and close one of said ports, a control valve arranged to open and close the other of said ports, means for operating the main valve for opening said main valve port, means controlled by the relative liquid pressure in said chamber and in said outlet for controlling the position of said control valve, and other means aected by the variations in the opening of said main valve for aEecting the position of said control valve.

7. In aboiled feed-water system a feedwater pipe, a valve casing mounted in said` pipe and having an inlet and an outlet, a chamber in said casing, a partition in said chamber having two valve ports in one of its sides, a second partition in said casing connecting with said port partition between said ports and separating said outlet from said inlet, a main valve in one of said ports, a control valve in the'othei port, means for varying the position of said main valve, and means for varying the position of said control valve in accordance with the flow of water through said main valve port and also in accordance with the position of said main valve.

8. In a boiler feed-water system, a feedwater valve and a control valve, a diaphragm for operating said control valve, communicating means lconnecting one side of said diaphragm with the inlet of said feed-water valve, communicating means connecting the other side ofsaid diaphragm .with the outlet of said feed-water valve, and resilient means connecting said two valves.

9. In a boiler feed-water system, a feedwater valve and a control valve for affecting the fall of pressure through. said feed-water valve, a. lever for operating each of said relative liquid pressures in said chamber and in said outlet for varying the position of said control valve.

hand.

VINCENT V. VEENSCHGTEN.

valves, and means connecting said two levers, V

said connecting means being arranged to adjustably affect the eectthereof on said levers.

l0. A valve mechanism comprising a casing having an inlet and an outlet, a chamber in said casing, a partition forming one side of said chamber and separating it from said inlet an outlet, two ports in said partition, a main valve arranged to open and close one of said ports, a control valve arranged to open and close the other of said ports,V said inlet adapted to receive liquid under pressure and to pass it through said ports to said out-let when said ports are open, means for operating the main valve for opening said main valve port, and means controllable by theA In testimony whereof, I hereunto set my 

